The coral rose brooch is lovely! I haven't seen it before. Reminds me of this Cartier brooch which is auctioned this month at Christie's. I wonder if it is the same maker...:
http://www.christies.com/LotFinder/LotFind...5/D4262553x.jpg
(and the whole thing:)
http://www.christies.com/LotFinder/search/...1&RQ=True&AN=31
The sapphire chrysanthemum brooch consist of, of course, several smaller sapphires:
http://royal-jewels4.tripod.com/brooch/qe2/page-3.html
Otherwise the Prince Albert's sapphire brooch has considerably large stone of a very good colour:
http://royal-jewels4.tripod.com/brooch/qe2/page-1.html